Crossword Puzzle Propped the pigskin

Clue: Propped the pigskin

Like a propped pigskin (TEED with 4 letters)
Nearly obsolete home theater peripherals (VCRS with 4 letters)
Theologies (ISMS with 4 letters)
Nickname for Theresa (TESSA with 5 letters)
Theater jeer (HISS with 4 letters)
End of theme (ONLABORDAY with 10 letters)
This puzzle's key theme word (ICE with 3 letters)
"Shall I compare thee to a summer's day?" has five of these (IAMBS with 5 letters)
Conspiracy theories (PLOTS with 5 letters)
Yeats's _____ Theatre (ABBEY with 5 letters)